class Student {
    static String schoolName;
}

public class Ex12 {
    public static void main(String[] args) {
        Student stu1 = new Student();
        Student stu2 = new Student();
        Student.schoolName = "清华大学";
        System.out.println("我是" + stu1.schoolName + "的学生");
        System.out.println("我是" + stu2.schoolName + "的学生");
    }
}